Improvement in mortisingwmachines



` be specified hereinafter.

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'"JAMEs suiruor NEWARK, NEW JERSEY.

' Leners Parana. 1oo,s1f3"` daad March 15, 1870.

`IIPROVEMEINT IN MORTISING-MACHINEE.

` The Schedule referred to in these Letters Patent and making part ofthe same To all whom it may concernl v Be it known-that I, Janus Smm, ofNewark, in the county [of Essex, and State of New Jersey, have inventeda. new and useful Improvement in Mortising-Machine; and I do herebydeclare that the follow-- ing is a full, clear, and `exact descriptionthereof, which will enable others skilled in the art to malte and 'usethe same, reference being had to the accompanying drawings forming partof this specification.

` This invention relates to mortising-machines, and

consists in certain improvement-s thereon which will machine.

Figure' 2 is a vertical section of Y "fig, 1, through theSimilarletters'of reference indicate corresponding parts.

A is the plunger.

B is the chisel. 1l I C is a sleevewhich is connected with the head D,forming a swivel-joint for `the yreversal of the plunger. v

AE Arepresents the mort`ising-table. Fis a pulley, which-isconstantly,revolved when `the machine isin operation yby means of theband G, which passes round the adjustable pulley H.

I is a sleevehthrough which the plunger passes with afeather-connection, so that the plunger with the chisel works throughit, but revolves asthe chisel is' reversed.

`On the upper collar of thissleevell, and on the underside `of thepulley F, disks of leather or of other suitable material are fastened,as seen at J,

gThe. surfaces of theseA disks are constantly in ccnt-act with eachother, and it is bythe friction pro duced by-such .contact that thechisel is reversed.

The friction being constant ris sufticient to reverse the chisel, orturn it one-half of a revolution whenever the sleeve I is released orset at liberty.

K K' represent lugs or pins on opposite sides of the lower collar ofthesleevc I.

L is a stop-bar, which yslides horizontally toward the sleeve, andisforced in that direction with a constant pressure by means ofthespring M.

rIhe end of this stop-,bar intercepts or prevents the reversal of thechisel while it is thus pressed forward, as the lugs K come incontactwith' it.

N is a bellcrank-shaped lever, whose joint or f'ulcrum is at O. C

at T.

The upper end of this rod S passes through a slot in th'e lower arm ofthe bell-crank or lever N.

foot-lever S by an adjustable connection, as seen` U is a spring, whichis attached` to this arm,`

which bears against `the rod S with a constant pressnre.

Y is a hook on the rod, which catches over the lower arm ofthebell-crank N when the rod is raised, by the pressure of the foot on thetreadles at the point W.

The table E is connected with the treadle at the point X, and its weightis sustained thereby, and serves to depress the back end of the treadle,and throw it into the position seen inthe drawing, whenever the pressureof the foot is removed.

Y is an adjustable screw in the top end of the rod S, the end of whichworks in contact with the inclined plane q. f y

The/spring U constantly presses ythe rod S and screw Y toward theinclined plane.

When the machine is in operation, the rod SV is raised by the pressureof the foot on the treadle, so that the hook V is passed up above theslot inthe arm of the bell-cran p f This does not alter the position ot'the stop-bar L,

which holds the chisel in" position while the pressure of the footcontinues. A When it is necessary to reverse ythe chisel the pressure isremoved, the weight of the table forces down the back end of thetreadle, which draws down therod S.

As this rod descends, the hook V will catch (for i which, it wil-l beremembered, is constantly revolving.

As the rod S, drops, the hook V is thrown (by the end of the screwY,which descends in contact with the inclined plane Q) back `into theslot, so that-the slide Lk is` acted uponv but an' instant, but stillthe chisel is allowed to make halfo'f a revolution or be reversed.

The lug k on the opposite side catches the end of the bar L, and, holdsthe chisel until itv is necessary to reverse it again, when the sameoperation is repeated.

The. bed `E is made adjustable in height, to suit d the depth of the cutof chisel, by means of thev nuts Z Z on the connecting-rod, as seeninthe drawing.

Having thus described my invention, v I claim as new and desire tosecure by Letters Patent- 1. The combinationof a constantly-revolvingpulley, F, with friction-disks J J and sleeve I, to give pivoted to thebar S with the treadle W,to adjust a, semi-rotation to the tool-stock,and reverse the the throw of bar S, as set forth.

chisel at the. times and in the manner specified. The abovespeciiication of my invention signed-by 2. The combination of a slottedbell-crank lever, me this 13th day of December', 1869.

N, having inclined surface q thereon, with notched JAMES SKIPP.

and pivoted spring bar S uv and pin g/,to operate the f Witnesses:

spring slide L M in the manner described. GEO. W. MAB'EE,

3. The combination of the adjustable connection T,` ALEX. F. ROBERTS.

